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[函数] 这个导数题第三问怎么做

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baxiannv posted 2022-5-23 10:21 |Read mode
Last edited by hbghlyj 2025-3-9 01:4920.已知 $f(x)=e^x, g(x)=a e^x+x, x \inR, a \inR$
(1)求 $f(x)$ 在 $x=0$ 时的切线方程
(2)当方程 $f(x)=g(x)$ 有且仅有 2 个不相等的实数根时,求参数 $a$ 的取值范围
(3)当 $a=1$ 时,若 $x_1<x_2<0, \frac{f\left(x_1\right)}{f\left(x_2\right)}=\frac{g\left(x_2\right)}{g\left(x_1\right)}$ ,求证 $x_1+x_2<\frac{-2 e-8}{e+2}$
我想用极值点偏移,然后发现横坐标是超越方程

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